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The motto „More is always better!“ is fundamentally wrong in many cases. Too much fertilizer burns plants, excessive light scorches leaves, and in many growing media, too much water will drown your plants. There are two crucial factors at play here: air and moisture.
Roots Need Air and Moisture
Both are required, so you must find the sweet spot where both are present. When soil becomes dry, there’s plenty of air but no water. When soil is saturated with water, it’s the opposite situation and equally problematic. Learning how to properly water hemp is essential.
Roots must have air, and if you’re growing roots in a water system, you need to oxygenate the water and maintain precise temperatures for it to work properly. Water farm systems are not recommended for beginners.
For soil growers, especially with larger plants, choose a pot size that would dry out within two days maximum, then water thoroughly every day or every other day. The plant sits briefly in water but draws up substantial moisture before running out of air. Then fresh air can enter. However, if the plant sits in wet conditions for 5 days, the roots stop functioning and growth stagnates.
Only when watering daily or every other day can you water thoroughly. Otherwise, lift the pot and only water when it feels lighter. But don’t overwater in this case. Some soil substrates only appear dry on the surface. Watering at this point will drown the plant. Lifting pots to check weight is the safest method.
Watering Hemp in Hydroponic Systems
There are several growing media including rockwool, coir, and coconut fiber that retain air even when wet. These are ideal for hydroponics. Water small amounts multiple times daily during light periods, using enough water so approximately 20% runs off. This runoff flushes residues from the growing medium. This allows automated watering since you don’t need to check each container individually. This is the major advantage, and many growers swear by having less work and higher yields. Others prefer soil growing because it tastes better and is more natural, but requires hand-watering hemp.
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There are also flood tables where plants sit on fabric and water continuously flows down from the upper edge. In aeroponics, roots are sprayed 24/7 with fine water mist. The roots hang in air, naturally providing oxygen access. Hydroponic systems can also use expanded clay pebbles, which can be watered manually.
Some soil-based substrates are enriched with perlite to maintain constant air pockets. These can often be watered quite thoroughly. Other systems sit above water reservoirs and draw moisture up through wicks into soil pots. There are many growing systems with their own specialized watering methods.
Greenhouse and Outdoor Hemp Watering
In greenhouses, roots can penetrate deep into the ground and go several days without watering, then receive a thorough watering. Water infiltrates the soil just like outdoors, and when soil conditions allow, roots get fresh air again. Once outdoor plants are well-established, you don’t need to water hemp at all since it rains naturally.
Even during week-long dry spells, roots can extract water from deep soil. However, maintaining and watering plants in a cultivated garden can make a decisive difference. Many wild outdoor plants survive, but they don’t develop to their full potential.
